Search any question & find its solution
Question:
Answered & Verified by Expert
A wire of length $10 \mathrm{~cm}$ is gently placed horizontally on the surface of water having
surface tension of $75 \times 10^{3} \mathrm{~N} / \mathrm{m}$. What force is required to just pull up the wire
from the water surface?
Options:
surface tension of $75 \times 10^{3} \mathrm{~N} / \mathrm{m}$. What force is required to just pull up the wire
from the water surface?
Solution:
2566 Upvotes
Verified Answer
The correct answer is:
$1 \cdot 5 \times 10^{-2} \mathrm{~N}$
$F=2(T L)=2 \times 75 \times 10^{-3} \times 10 \times 10^{-2}$
$=150 \times 10^{-4}=1.5 \times 10^{-2} \mathrm{~N}$
$=150 \times 10^{-4}=1.5 \times 10^{-2} \mathrm{~N}$
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.